# Table
**Source definition:** [`src/bitdrift/public/unary/dashboards/v1/api.proto#L227-L247`]()
| Field | Type | Description |
|---|---|---|
| group_column_key_names | array of string | Headers for the columns of each group by field (for example, "country", "device_type", etc.). If there are no group by fields this will be empty. |
| value_column_key_names | array of string | Headers for the columns that contain aggregated values (for example P99, Min, etc.). |
| rows | array of [bitdrift.public.unary.dashboards.v1.TableRow](bitdrift_public_unary_dashboards_v1_TableRow.md "bitdrift.public.unary.dashboards.v1.TableRow") | Each row in the table represents one unique combination of group-by columns. |
| unique_devices | optional uint64 | The unique devices for the entire table based on the TrackUnique configuration. |
| title | string | The title of table, which is derived from the TimeSeries title in the rule chart config. |
| cardinality_overflows | [bitdrift.public.shared.workflows.v1.CardinalityOverflows](bitdrift_public_shared_workflows_v1_CardinalityOverflows.md "bitdrift.public.shared.workflows.v1.CardinalityOverflows") | The total count of cardinality overflows for this time series that occurred during the query time period. |
Example
```json
{
"cardinality_overflows": {
"group_by_overflows": 1,
"query_group_by_collapsed": false,
"total_overflows": 42
},
"group_column_key_names": [
"app_id"
],
"rows": [
{
"aggregated_values": [
{
"rate_details": {
"denominator_count": 42,
"numerator_count": 42
},
"value": 1.0
}
],
"group_column_values": [
"io.example.app"
],
"unique_devices": 1
}
],
"title": "Table title",
"unique_devices": 1,
"value_column_key_names": [
"count"
]
}
```